FJO Input to Map enabled ECM

Snidley

New Member
Eric,

Talked to Steve on the A/F readings I am getting on the scanmaster showing a different value than the W/B reader. Do I add or remove values into the ECM if the scanmaster is showing lower or greater values to reflect the readings shown on the W/B reader? Steve said that the AF position and the WB reader should show the same value and I am wondering if I have the WB input wires connected properly.

I contacted B.Bailey on the input wires leading to the ECM to from the FJO WB sourcee to see if the connection is the problem. He said that he was not familier with the FJO WB and didnt have an answer.

There seems to be a gap in the instructions from Baileys ECM grey and white leads to the FJO 02 sensor. There is a connector that has four input/output leads from the WB Unit. A,B,C and D. C & D are Power and Ground and two others "A" & "B" I think go to the ECM input grey & white wires Correct? If so, which wire goes to which lead from the WB? Or do I have another problem?:confused:
 

EricM

Administrator
Staff member
Pin A from the FJO should be connected to B2 at the ECM. B2 is the 2nd one from the end. The other wire from the ECM (B1) does not have to be used, so tape it off.

If the wiring is right and they don't match up, you can adjust position A on the MER to move the A/F up and down. Each number is .1 A/F.

Let me know how far off it is. If it's way far off, we might have to adjust the chip to get it to match better.

Eric
 

Snidley

New Member
FJO WB to ECM wiring

Eric said:
Pin A from the FJO should be connected to B2 at the ECM. B2 is the 2nd one from the end. The other wire from the ECM (B1) does not have to be used, so tape it off.

If the wiring is right and they don't match up, you can adjust position A on the MER to move the A/F up and down. Each number is .1 A/F.

Let me know how far off it is. If it's way far off, we might have to adjust the chip to get it to match better.

Eric

Eric,

I had the wires wrong. I followed your instructions and scan master is only .1 value off from the FJO AF 02 output reading. I would like to suggest if Bob B. is doing the the ecm mod that the instructions reflect proper wiring diagram for all of the various AF 02 systems used. I do not know who would be responsible for that portion of the installation but it would be helpful to the novice user like myself because of the gap in instruction now. Thanks for your help!!!
 
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